quiz 14

Question 1

Which types of metals can be extracted from their oxides by reduction with carbon?

Answer 1

Metals less reactive than carbon

Question 2

How can metals be placed in order of their reactivity ?

Answer 2

Add each metal to water or acid
observe which metals react the most(by the amount of fizzing)

Question 3

Define oxidation in terms of loss and gain of oxygen

Answer 3

oxidation is the gain of oxygen

Question 4

Which types of metals cannot be extracted from their oxides by reduction with carbon?

Answer 4

Metals more reactive than carbon

Question 5

Define reactivity series

Answer 5

A list of elements ordered by their reactivity

Question 6

Name the process used to extract metals more reactive than carbon

Answer 6

Electrolysis

Question 7

Explain why gold and silver can be found as the metals themselves in the earths crust

Answer 7

They are very unreactive

Question 8

Define oxidation in terms of loss and gain of electrons

Answer 8

oxidation is the loss of electrons

Question 9

Explain why some metals are more reactive than others

Answer 9

They lose electrons more easily

Question 10

Define reduction in terms of the loss and gain of oxygen

Answer 10

Reduction is the loss of oxygen

Question 11

Define reduction in terms of loss and gain of electrons

Answer 11

Reduction is the gain of electrons

Question 12

State what is formed when a metal reacts with oxygen

Answer 12

a metal oxide

Question 13

Name 2 metals found as the metals themselves in the earths crust

Answer 13

Gold and silver

Question 14

A student is investigating the temperature change when a metal is added to a range of acids. Name the independent variable

Answer 14

The acid

Question 15

When measuring the temperature of a reaction, explain why a polystyrene cup is better than a glass beaker

Answer 15

polystyrene is a good thermal insulator, so it minimises the thermal energy to and from the surroundings

Question 16

A student is investigating the temperature change when a range of different metal are added to acid. Name the independent variable

Answer 16

The metal

Question 17

A student is investigating the temperature change when a range of different metals are added to acid. Name the dependent variable

Answer 17

The temperature change

Question 18

A student is investigating the temperature change when a metal is added to a range of acids. Name the dependent variable

Answer 18

The temperature change

Question 19

A student has 3 different metals. They want to investigate how the different types of metals cause a different temperature change when added to an acid. outline a method to do this. Ensure a method leads to a valid conclusion

Answer 19

Measure a specific mass of the first metal

use a measuring cylinder to measure a set volume of acid and pour it into a polystyrene cup

Measure the temperature of the acid

Add the first metal to the acid

Measure the highest temperature reached by the acid

Repeat the experiment with the other two metals

Ensure that the following variables are kept constant: mass of metal,particle size of metal,type of acid,volume of acid and concentration of acid

Question 20

A student is adding ammonium chloride to water, creating an endothermic reaction. They want to know how the mass of the ammonium chloride added affects the temperature change. outline a method to do this. Ensure the method that leads to a valid conclusion

Answer 20

Measure a specific mass of ammonium chloride

use a measuring cylinder to measure a set volume of water and pour into a polystyrene cup

Measure the temperature of the water

Add the ammonium chloride to the water

Measure the highest temperature reached by the water

Repeat the experiment with other masses of ammonium chloride

Ensure that the following variables are kept constant: volume of water, particle size if ammonium chloride, source of water